|Patent 1,373,112 · Backus's Check Lock · Page 3|
21 upon the spring 20 is engaged so that said spring will when the
bolt is released, retract the bolt upwardly and mounted upon the
rib 44 of said bolt at a point substantially midway between the ends
of the arm is a rack 47. As particularly shown in Figs. 6 and 7
of the drawings, this rack is formed of companion sections arranged
side by side in abutting relation resting against the rib 44 and
extending from the inner edges of said sections are tongues 48 fitted
through a suitable opening in the rib and overturned thereagainst.
Thus, the rack sections are firmly secured upon the bolt and, as will
now be noted, the side flange of the bolt adjacent the rack is, as
best shown in Fig. 6, cut away as indicated at 48 so that the lower
end of the pawl 17 may coöperate with the rack, this pawl
being held in engagement with the rack by the spring 18. Accordingly,
when the lock bolt is depressed, the pawl will serve to lock the bolt
in depressed position while, when the key check 36 is inserted in the
guide 25 and the pawl released, the rack 47 will engage at its upper
end against the uppermost of the flanges 11 of the back plate 10 for
limiting the lock bolt in its upward movement under the influence of
the spring 20.
Having thus described the invention, what I claim as new is:
1. A check lock including a hook, a pivoted latch coacting therewith, a lock bolt shiftable to closely confronting the latch at one point and project through the latch at another point, and means for locking the bolt when shifted.
2. A check lock including a hook, a pivoted latch coöperating therewith and having a convex face, a lock bolt shiftable to impinge the latch and having a concave face to fit the convex face of the latch for securing the latch against side movement, and means for locking the bolt when shifted.
3. A check lock including a hook, a pivoted latch coöperating therewith and having spaced arms, a substantially U-shaped lock bolt shiftable to impinge one of its arms
against the latch and project the other of its arms between the arms
of the latch, and means for locking the bolt when shifted.
4. A check lock including a hook, a bolt coöperating therewith and having a medial rib provided with an opening, a rack seating against said rib and formed of mating sections having tongues engaged through said opening, and a pawl to coöperate with the rack for locking the bolt when shifted.
5. In a check lock, a pressed substantially channel shaped hook having its side flanges notched at the free end of the hook to form a tip and to define shoulders at the lower ends of said notches, a pressed substantially channel shaped head receiving the tip between the side flanges thereof, one of the head flanges being notched to fit the hook and the other of the head flanges being slotted to receive the flanges of the hook seating against said shoulders, and means extending through said tip and the flanges of the head securing the head in position.
6. In a check lock, a hook, and a substantially channel shaped latch pivoted upon the shank of the hook to extend across the bight thereof coöperating with the hook.
7. In a check lock, a hook, a substantially channel shaped latch having its side flanges extended to provide arms embracing the hook shank, and means extending through said arms and the hook shank pivotally connecting the latch with said shank to coact with the hook.
8. In a check lock, a hook, and a substantially channel shaped latch pivoted upon the hook to extend transversely across the bight thereof and having its body wall extended to provide a head at the outer end of the latch.
9. In a check lock, a suspension hook, and a substantially channel shaped latch pivoted thereon and pressed from a sheet metal blank to provide arms embracing the hook and pivotally connected thereto.
In testimony whereof I affix my signature.